Operating system

The most important program that runs on a computer.Every general-purpose computer must have an operating system to run other program.It is the medium of communication between the Human(user) and computer.Operating sytems send information to hardware and other third-party software for performing basic tasks.such as clikcing,maximizing,saving,loading etc.It also display information on the screen Their are many os in the market such as Windows XP,Vista,Mac Os X,Linux and Unix and not to mention Ms-dos(The first os).

The main functions of OS is time sharing,resource sharing and memory allocation among all tjose programs...